Exhaust trap construction



May 26, 1931. A. J. CULP' 1,307,512

EXHAUST TRAP CONSTRUCTION Filed July 11, 1929 2 Sheets-Sheet 1 Jmwntoc May 26, 1931. A. J. CULP 1,807,512

EXHAUST TRAP CONSTRUCTION- I iled July 11, 1929 2 Sheets-Sheet 2 3"? l 24 H 4a 7 11 if Patented May 26, 1931 PATENT OFFICE ARTHUR J. CULP, OF C'LANTON, ALABAMA EXHAUST TRAP CONSTRUCTION Application filed July 11,

This invention relates to an exhaust trap construction adapted for use generally in connection with .the treatment of exhaust from internal combustion engines and par- ?6 ticularly for use in connection with the bustion engine.

exhaust trap of Letters Patent 1,673,619 issued to me on June 12, 1928 and with the apparatus disclosed in my application Serial Number 82,312,'fi1ed January 19, 1926 for an improved apparatus and method for treating exhaust of hydro-carbon engines.

It is aimed to provide a novel construction which is closed at the time the explosions occur so as to nullify the incidental sound and also to provide a construction which prevents any back pressure from entering through the exhaust pipe to the pistons or cylinders of the motor.

Another object is to provide a construction employing a novel valve which is adapted to be automatically opened through the action of the small flow of exhaust to permit the full volume of exhaust to escape and air from the atmosphere to enter and automatically close the valve construction.

The more specific objects and advantages will in part be pointed out and otherwise become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiment.

In said drawings Figure 1 is a plan View of the improved trap, I Figure 2 is an end elevation lookmg from the right of Figure 1,

Figure 3 is a central vertical sectional view taken on the plane of line 33 of Figure 1, and

Figure 4 is a cross sectional view taken on the line 4.-4 of Fi ure 3.

Y Referring specifically to the drawings, 10 designates the outlet of a conventional exhaust pipe leading from an internal com- The improved trap is attached to such exhaust pipe 10 and may have a flared attaching section as at 11 partly telescoping said exhaust pipe 10 and for instance secured thereto by a clamping nut 12 threaded on section 11 and adapted 1929. Serial No. 377,459.

to compress binding material as at 13. Any suitable means may be employed for attaching the section 11 to the exhaust pipe 10 irrespective of differences in size or otherwise according to different makes of automobiles.

The exhaust gases are delivered into the section 11 and flow thence into a tubular extention 14 on a diaphragm 15 which is bolted as at 16 to flanges 17 and 18 provided on section 11 and diaphragm 15, respectively. A gasket 19 is interposed between the flanges 17 and 18.

The gases are adapted to escape from the cylinder 14 through one or more ports 20 provided in its peripheral wall, which ports are normally closed by a cap valve 21 slidably telescoped over the periphery of cylinder 14 and at its free edge adapted for engagement with a gasket or packing as at 22 which is held in place by the bolts 16 and by a flange 23, also held in place by such bolts 16.

The flange 23 is part of a hood 24 which surrounds and is relatively large with respect to the cylinder 14 and valve 21. The end wall of cylinder 14 as designated 25 has a port 26 therethrough which is normally closed by a tapered valve 27 of plug form, carried by a stem 28. The stem 28 has an enlarged screw threaded portion 29 which is threaded in a suitable opening in the end wall of the cap valve 21 and is also engaged by nuts 30 screw threaded thereto, and one of which serves as a lock nut for the other, such nuts binding the plug 27 tightly against the inner surface of the end wall of cap valve 21. Hood 24 is open to the atmosphere at 31.

Fastened to the end wall 32 of hood 24, is a supplemental hood 33, by means of screws 34. The stem 28 is slidably mounted in the outer end wall of supplemental hood 33 and the wall 32 is cut away as at 34 to accommodate movement of nuts 30 and adjacent parts. An expansive coil spring 35 surrounds the stem'28, bearing against the wall 33 and the nuts 30, thus urging the plug 27 normally to its seat and the cap valve 21 normally to closed position An annular flange 36 projects forwardly from the wall 25 and is disposed about the opening 26 and plug 27.

The cylinder 14 serves to baiiie the exhaust gases, the same moving the valve plug 27 slightly away from its seat 26 against the 7 tension of the spring 35, thus permitting a limited quantityof the exhaust to pass etween the wall and end Wall of the cap valve 21, the valve 21 thus being moved. uni.- tarily with the plug 27 to. an extent Where.

the valve 21 uncovers the ports 20, enabling occur in the internal combustion engine in connection with which the invention is as viding a seat for the free edge of the valve,

" sociated, that the ports 20 are closed by the val-ve2-1- and that the-incidental noise is practicall y nullified.

The-valve-21z seats both against the gasket 22 and the flange36. I find that any chat tering or, noise incidental to operation of valve'2l occurs mostly onthe closing stroke of such valve and in view of the factthat the flange 86- is provided, such chatter or noise-is mufiled between the-Wall 25 and end wall of valve 2-1.

Means isprovided whereby instead of an toinatic operation of the valve 21-, the same may be opened by manual means during operation in order to test the efliciency oithe device without resorting toremoval ct any part otthe mechanism. To this end, a lever 37 is pivoted at 87 to the supplemental hood 323 and it has a lower-bifurcated end 38str-addling the stem 28 and-bearing against an abutment 39 thereon. Lever 37' is maintained adjacent the hood 33 at its lower-end by an expahsivespring-O, engaging the same and also engaging a bracket 4*1 secunedi in 7 place by one of the screws 34-. A draav element l2 may shift the lever 37 in order toiopen the valve 21,.such draw element being under control: by; means located: on the dash.

or instrument. board of the automobile or in any other convenient locatio n;.,

Various: changesmay be; resorted. to pro.-

vided they fall within the spirit; and: scope of; the invention.

claim asmy-invention::.

l. A trap of the class: described having a cylinder adapted toreceive exhaust, said cylinder havingan outletport in its peripheral wall,a valve normally closing said port,,said cylinder having an. additional. port, a. portion of said valve occupying said. additional port, said; portion being engageable by the exhaust todisplace the valve in order to uncover the first mentioned port-,, means pro and a flange. on said cylinder in the path of and adapted tobe-abutt'edby said valve.

2. A trap of the class described having a cylinder to receive exhaust gas, said cylinder having an outlet port in its peripheral wall and a port in its end wall, a cap valve slidable on said cylinder normally closing the discharge port, said cap valve having a plug occupying the second mentioned port, said plug being displaceable by the exhaust gases tomove the valve to uncover the first mentionedport.

3; A trap of the class described having a cylinder toreceive exhaust gas, said cylinder having an outlet port in its peripheral Wall and aiportiinits,end wall, a cap valve slidable on said cylinder normally closing the dischargeport, said cap valve. having'at plug occupying-the second? mentioned port,.said plug beingdisplaceable by the exhaustgases to move the valve to uncover thesfirst.

tioned ort and: a. flan e extendin i out..-

wardly from said end wall and; annularlyaround the second mentioned port and: en.- gageable bytheend. of the capzvalvet all A trap of the class described having: a;

cylinder to receive exhaust.gas,..sa-id.v cylinder having an: outletport in. its peripherali wall and: a port in itsend Wall, a capvalve slidable on said cylinder normally closing thediscl'iarge port, said cap valve having a; plug occupying" the second mentioned. port, said plug being displaceable bythe exhaust gases t'o move the valve touncover lllIE/fiffit mentioned port, a flange extending; out?" war-ally from; said end Wall: and annularly around the second mentioned port. and engageabl'e by the end ot the cap valve, a hood about said valve and; cylinder, azstemextending: t'nom said: valve, means on the hood mounting said stem for sliding'movementr, an expansive coil springsurrounding the. stem and abutting said: valve. and: SET/ldl means.

5 An exhaust trap. ot the: class. described comprising an. attaching section, a dia':

phragn'i and: a hood, means securing said. section, diaphragm. and hood together, said diaphragm having a cylinder provided with; an outlet port in its peripheral Welland. a port in its end Wall, a cap valve slidableon. said cylinder and normally closing the firstmen': tioned: port,- a part-of thecap valve normally closing the other port and being adapted for engageinentby exhaust to move the;v valve to uncover the first mentionedfport, and. a spring against the tension 0t which; Said valve moves.

V w 6. An exhaust trap ofi theclassdescribed comprising ,an. attaching section, a: .diaphra gum and a hood, meanssecuring said sec.- tion, d aphragm. and hood together, said: diaphragm having a cylinder provided with an outlet port in: its peripheral. wall and; a port in its end wall, a cap. vallve slidable onrsaid cylinden and normally closing; the: firstimem tione'd port, apart ofthecapwvalve normally closing the: other portand: beingadaptedfor engagement by exhaust to move the valve to uncover the first mentioned port, a spring against the tension of which said valve moves, a flange extending outwardly from the end wall of the cylinder and adapted to be abutted by the end wall of the cap valve, said hood being in communication with the atmosphere, and means operable manually to move said cap valve.

In testimony whereof I aifix my signature.

ARTHUR J. CULP. 

